'Cannot Read struct with string from PLC using s7netplus c#

im trying to read this data block from Siemens S1500 PLC using s7netplus libary

and my mapped code struct looks like this

public struct testStruct
    {
        public bool Campo_Bool1;
        public bool Campo_Bool2;
        public short Campo_Int1;
        public short Campo_Int2;
        public int Campo_Dint1;
        public int Campo_Dint2;
        public double Campo_Real1;
        public double Campo_Real2;
        public string Campo_String1;
        public string Campo_String2;
    }

I'm using this command to read the struct

teststruct = (testStruct)client.ReadStruct(typeof(testStruct), 1);

Error message is "Please add S7StringAttribute to the string field"

How can I read this Structure?

Thank you very much.

EDIT 2.0: This is my new struct

public struct testStruct
    {
        public bool Campo_Bool1;
        public bool Campo_Bool2;
        public short Campo_Int1;
        public short Campo_Int2;
        public int Campo_Dint1;
        public int Campo_Dint2;
        public float Campo_Real1;
        public float Campo_Real2;
        [S7String(S7StringType.S7String,8)]
        public string Campo_String1;
        [S7String(S7StringType.S7String,8)]
        public string Campo_String2;
    }

New error message is "Received error from PLC: Address out of range."

This is my DB

enter image description here

c++sharp.netstructplc


Solution 1:[1]

From the s7netplus wiki (here), ReadStruct/WriteStruct methods do not support strings:

enter image description here

Sources

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Source: Stack Overflow

Solution Source
Solution 1

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